Metallic insert.



F. G. & H. 0. McIVHLLAN.

METALLIC INSERT.

APPLICATION FILED MAY 2 2, I916.

1,24,993. Patented Sept. 25, 1917.

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Specification of Letters Patent.

Patented Sept. 25, act '7.

-. Application filed May 22, 1916. Serial No. 99,149.

To all whom it may concern:

Be it known that we, FRANK G. MCM ILL AN' flat piece of sheet steel. It may be made in any deslred lengthand is adapted to be and HOWARD O. "MOMILIQAN, citizens of the embedded in theconcrete of the wall or floor.

United States, residing at Minneapolis, in the county of Hennepin and State of Min- Improvements in Metallic Inserts; and we do hereby declare the following to be a full,

the ends of the tube and prevent'the con- -clear, and exact description of the invention, such as willenable others skilled in the art .to which it appertains to make and use the same.

7 Our invention has for its object to provide an improved metallic wall insert adapted for use to anchor nut-equipped bolts'to concrete walls or slabs;. and to such ends, generally stated, the invention consists of the novel construction and combination of parts hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Figure l is an end elevation of the improved wall insert showing the same attached to one of the boards upon which a concrete floor'is to be formed;

Fig. 2 's a longitudinal section on the line :0 m of ig. 1;

Fig. 3 is a section on the line :0 m of Fig.2;

Fig. 4 is a transverse vertical section taken approximately on the line m w? of Fig. 5, showing the insert embedded within the concrete floor;

Fig. 5 is a section on the line as an of Fig. 4:; and 1 Fig. 6 is a perspective with some parts broken away, showing the tubular body of the insert. a

In Figs. 1, 2 and3, the numeral 1 indicates one of the boards of a temporary wooden floor upon which the concrete floor is to be formed, and in Figs. 4 and 5, the numeral 2 indicates a concrete floor in which the insert is embedded. The numeral 5 indicates a bolt provided with a nut 6, which nut, as shown, is of the square or rectangular type. The body 7 of the insert is of tubular form, but is provided with a long slot 8 that runs, preferably from end to end thereof. This tubular body may be made in different ways, but is preferably rolled from a of the tube.

ts form is such that when it is embedded, it w ll, even without additional anchoring nesota,have invented certain new and useful means, be quite securely anchored in the concretef" However, it should be further anchored by additional devices which also close crete from entering except at the very ends For short tubes, only two anchors will be provided and each would be in the form of a disk 9 having a flat flaring tail portion 10. In order that the disks 9 can be inserted into the ends of the tube, the latter is formed with notches 11, and preferably, also, with intervening clenching lips 12, which latter are adapted to be inserted" through perforations in the tail portion 10. When the disks 9 are inserted into the ends of the tube with the lips 12 projected through the perforations thereof, .and the the board 1, as shown in Fig. 2.

For long insert tubes, one or more intermediate anchors, such as best shown in F 1g. 3, but also indicated in the other views, may

be employed. This intermediate anchor is.

formed from, a piece of sheet metal 15 stamped to form diverging legs and having a circular opening through which the tube can be telescoped. The tube is, of c0urse',flplaced so that its slot 8 will be flush with the surface of the concrete slab or wall and in. line with the said slot 8, and the perforation in the anchor 15 through which the tube is passed will be left open so that said anchor will not interfere with lateral sliding movements of the bolt 5 within the 'slot 8. j

Preferably, the slot 8 will be of such Width that the nut 6 may be inserted edgewise through the same. Obviousl when the nut:

is inserted and turned paral e1 to the plane of the slot, it will engage the tube, as best shown in Fig. 4, so that the threaded end of the bolt may be then screwed through the nut and the nut will be anchored against the tube.

,When the tube and the anchors are embedded in the, concrete, the said tube will be very firmly and-rigidly secured in the concrete slab, and its walls will be reinforced by the concrete, so that they will have great strength, even when the tubular insert is made of comparatively thin metal. ously, the bolt may be applied at any desired place within the slot 8, so that a large range of adjustment is provided for and it is not necessary to set the insert with great accuracy. Obviously, increased length of the tubular insert will add but very slightly to the cost thereof, inasmuch as the end anchors will be of the same form in all cases. The end anchors and the intermediate anchors may be applied to the tube,

either before shipment, or atthe place where they are to be put up. If applied before I shipment and the lips 12 turned over, all of the composite parts of the insert will -be connected and ready for use. f As shown, and referably, the tubular insert is made cylindrical incross section,'but its form may, of course, be varied.

The cylindrical form, however, is best, because when it is embedded in the concrete with its rod exposed at one surface thereof, it will be held by the concrete with a sort of a dove-tailed action even where special anchors are not provided and will, in fact, be so firmly held by the surrounding concrete that it will not be pulled from position without tearing away a very considerable part of the concrete body.

What we claim is: I 1. A wall insert comprising a metal tube normally open at its ends, provided with a longitudinal slot and provided with end notches opposite its slot, and disks inserted into the ends of said tube, and having an choring portions projecting through said ,end notches and adapted to be embedded in the concrete. 4

2. A wall insert comprising a metal tube having open ends and a longitudinal slot, and metal disks insertible into the ends of said tube and having interlocking engagement therewith and provided with pro'ecting anchor portions adapted to be embe ded in the concrete, the said disks further hav- Obvi- Y ing laterally projecting ea'rs alined with the slot of said tube and adapting the insert to be temporarily secured to one of the boards of the concrete form.

3. A wallinsert comprising a metal-tube normally open at its ends, provided with a longitudinal slot and provided with end notches opposite itsslot, and disks inserted into the ends of said tube, and having anchoring portions projecting through said end notches and adapted to be embedded in theconcrete, the said disks having out-' turned laterally projecting ears alined with the slot of said tube and adapting the insert to be temporarily secured in one of the boards of the concrete form.

4. A wall insert comprising a metallic tube normally open at its ends, provided with a longitudinal slot, and having end notches and intervening clencher lips opposite said slot, and metal disks inserted into the ends of said tube, said disks having perforations through which said lips are passed and clenched, and further havinganchor- 'be exposed at the surface of a concrete body,

said tube being normally open at its ends, and anchorin heads having interlocking engagement w1th the normally open ends of said-tube, and substantially closing said ends when applied, said heads having projecting anchors extended therefrom in a direction away'from the slot of said tube,-the points beyond the back of said tube, and adapted to be embedded in the concrete.

In testimony whereof we aflix our signatures in presence of two witnesses.-

FRANK G. MoMILLAN. HOWARD O. McMILLAN.

. Witnesses:

CLARA DEMARnsT, B. G. WHEELER\ 

